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Income Taxes - Operating Loss Carryforwards (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards, annual limitation $ 2,700  
Internal Revenue Service (IRS)    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 23,771 $ 4,507
Operating loss carryforwards, annual limitation 3,337 646
Internal Revenue Service (IRS) | Ownership Change | Saehan Bank    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 1,131 1,357
Operating loss carryforwards, annual limitation 226 226
Internal Revenue Service (IRS) | Ownership Change | Pacific International Bancorp. Inc.    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 2,730 3,150
Operating loss carryforwards, annual limitation 420 420
Internal Revenue Service (IRS) | Ownership Change | Territorial Bancorp Inc.    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 19,910  
Operating loss carryforwards, annual limitation 2,691  
State and Local Jurisdiction    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 21,594 1,809
Operating loss carryforwards, annual limitation 2,917 226
State and Local Jurisdiction | Ownership Change | Saehan Bank    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 1,583 1,809
Operating loss carryforwards, annual limitation 226 226
State and Local Jurisdiction | Ownership Change | Pacific International Bancorp. Inc.    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 0 0
Operating loss carryforwards, annual limitation 0 $ 0
State and Local Jurisdiction | Ownership Change | Territorial Bancorp Inc.    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 20,011  
Operating loss carryforwards, annual limitation $ 2,691